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Now showing items 141-147 of 147
Leopard tortoises in southern Africa have greater genetic diversity in the north than in the south (Testudinidae)
(Wiley, 2018)
In contrast to mammals, little is known about the phylogeographic structuring of widely distributed African reptile species. With the present study, we contribute data for the leopard tortoise (Stigmochelys pardalis). It ...
Deeper knowledge of shallow waters: reviewing the invertebrate fauna of southern African temporary wetlands
(Spring Nature Limited, 2018)
Temporary lentic wetlands are becoming
increasingly recognised for their collective role in
contributing to biodiversity at the landscape scale. In
southern Africa, a region with a high density of such
wetlands, ...
Automorphism groups of graph covers and uniform subset graphs
(Taylor and Francis Group, 2018)
Hofmeister considered the automorphism groups of antipodal graphs through the exploration of graph covers. In this note weextend the exploration of automorphism groups of distance preserving graph covers. We apply the ...
A robust spectral method for pricing of American put options on zero-coupon bonds
(Global-Science Press, 2018)
American put options on a zero-coupon bond problem is reformulated as a
linear complementarity problem of the option value and approximated by a nonlinear
partial differential equation. The equation is solved by an ...
Relative homotopy in relational structures
(Cambridge University Press, 2018)
The homotopy groups of a finite partially ordered set (poset) can be described entirely in the
context of posets, as shown in a paper by B. Larose and C. Tardif. In this paper we describe the relative
version of such a ...
Efficient superoxide scavenging and metal immobilization in roots determines the level of tolerance to vanadium stress in two contrasting Brassica napus genotypes
(Elsevier, 2018)
Brassica napus also known as Rapeseed is a member of the Brassicaceae family which is mainly cultivated for its
oil-rich seeds. Indeed, B. napus is ranked the third-largest source of vegetable oil in the world. Brassica ...
Influence of termites on the soil seed bank in an African savannah
(Wiley, 2018)
In savannah ecosystems, termites drive key ecosystem processes, such as primary
production through creation of patchiness in soil nutrients availability around their
nests. In this study, we evaluated the role of termites ...